we all know that his success was__ to hard work

we all know that his success was__ to hard work We all d__ whether our hard work will lead to success, we wa His success ( ) his hard work. The famous scientist _____ his success to hard work his success is entirely due to hard work Hard work has a lot to do with his success. We all know__is the to__ A.work hard;success B.work hard;suc believe that hard work is the key to success】 His success was due to his hard work这句语法对吗 She says if we work hard,success is sure to be o_,so we ry t It takes hard work to achieve success. Hard work is essential to success.